Studies on Synthesis, Properties and Thermal Analysis of Complexes of Rare Earth Isothiocyanates with Dimethyl Sulfoxide

Abstract

Abstract: Fifteen new solid complexes of rare earth isothiocyanates with dimethyl sulfoxide (DMSO) were synthesized and characterized by chemical analysis, IR and X-ray diffraction.Compositions of the complexes conform to the formula RE(NCS)₃·mDMSO(RE=La, Ce, Pr, Nd, Sm, Eu, Gd, m=5, RE=Tb, Dy, Ho, Er, Tm, Yb, Lu, Y, m=4).Thermal decompositions of the complexes were studied by TG-DTA-DTG.The values of activation energy and reaction order for the first steps of decomposition of the complexes were determined from TGcurves, using the Coats-Redfern method.The results show that the activation energy depends on the atomic number of lanthanoids, and "double peak phenomenon" is observed.

Key words: Rare earth, Isothiocyanate, Dimethyl sulfoxide, Thermal analysis

TrendMD:

Sun Tongshan, Zhang Jianhua, Jiang Bengao, Yin Jingzhi . Studies on Synthesis, Properties and Thermal Analysis of Complexes of Rare Earth Isothiocyanates with Dimethyl Sulfoxide[J]. Chem. J. Chinese Universities, 1989, 10(12): 1167.

References

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